According to their main chemical composition, they are classified into chromium stainless steel, chromium-nickel stainless steel and chromium-manganese-nitrogen stainless steel, etc. It can also be classified into acid-resistant stainless steel and heat-resistant stainless steel, etc. according to performance characteristics. It is usually classified by metallographic structure. Classified by metallographic structure: ferriteFType stainless steel, martensiticMType stainless steel, austeniticAType stainless steel, austenitic-FerriteA-FDuplex stainless steel, austenitic-MartensiteA-MType duplex stainless steel and precipitation hardeningPHType stainless steel.

　　According to shape, it can be classified into round steel, square steel and special-shaped steel

　　Stainless steel profiles are stainless steel materials with different cross-sectional shapes obtained by hot-melting and extruding stainless steel rods. The production process of stainless steel profiles mainly includes three steps: melting and casting, extrusion and coloring. Among them, the coloring mainly includes processes such as oxidation, electrophoretic coating, fluorocarbon spraying, powder spraying, and wood grain transfer printing.